\documentclass{article}
\usepackage{epsfig}
\usepackage{color}
\usepackage{amsmath,amsfonts,amssymb}
\usepackage{geometry}
\newcommand{\twosub}[2]{\begin{subarray}{l}{#1}\\{#2}\end{subarray}}
\newcommand{\NTF}	{\mathop\text{NTF}}
\newcommand{\STF}	{\mathop\text{STF}}
\geometry{b1paper}

\begin{document}
\pagestyle{empty}
\input{STF_objective_function}
\end{document}